Terebra. 
MOLLUSCA. 
49 
2. M. parva —The Small Mitre, pi. XXXI. fig. 24 and 27. 
Mitra parva. Sowcrby, Min. Conch. V. p. 37, pi. 430, 
fig. 1. Fleming, Brit An. p. 334. 
Shell ovate, fusiform, short; spire consisting of four rather 
tumid volutions, with their upper edges well defined by the 
suture; the whole shell covered by equal transverse furrows, 
the upper one on each volution being wider than the others 
produces a marginated appearance ; between the sulci 
the surface is smooth and shining; aperture elongated, 
somewhat straitened above; columella with four plaits; 
outer lip plaited within. Length, a quarter of an inch ; 
diameter, an eighth. 
Found plentifully in the London Clay at Barton Cliff. 
3. M. pumila. — The Dwarf Mitre, pi. XXXI. fig. 23 
and 20. 
Mitra pumila. Sowerby, Min. Conch. V. p. 37, pi. 430, 
fig. 2. Fleming, Brit. An. p. 334, 
Shell ovate, fusiform, short; spire consisting of five some¬ 
what inflated volutions well defined by the suture, crenated 
above, and terminating in a sharp apex; the whole shell 
covered with pretty deep transverse sulci, which are decus¬ 
sated by numerous, slightly elevated, longitudinal, equidistant 
ribs, dividing the sulci into regular square meshes, and pro¬ 
ducing a rough appearance ; aperture elongated, acute above ; 
columella with four plaits; outer lip plaited within. 
Found in the London Clay at Barton Cliff. 
FAMILY III.—PURPURIFERA. 
Shell with a short canal, ascending posteriorly, or 
with an . oblique notch at the base of its aperture, 
directed backwards. 
SUBDIVISION I.-SHELLS HAVING AN OBLIQUE NOTCH 
DIRECTED BACKWARDS. 
Genus X.—TEREBRA.— Lamarck. 
Shell greatly elongated, subulate, turreted, acumina¬ 
ted, usually with many volutions, which decrease 
gradually in dimensions from the base to the apex ; 
aperture longitudinal, generally a third shorter than the 
spire, frequently much shorter, and notched at its 
posterior base; base of the columella contorted and 
oblique, provided with a short canal; operculum cor¬ 
neous, but not spiral. 
1. T. vetusta. — The Ancient Terebra, pi. XXXII. 
fig. 44. 
Terebra vetusta. Phillips, Geo. of Yorkshire, I. p. 152, 
pi. 9. fig. 27. 
Shell consisting of eleven or twelve gradually tapering 
volutions, terminating in an acute apex, and divided by a 
pretty deep suture; whole shell with longitudinal, straight, 
and moderately strong ribs ; aperture elongated. 
Found in the Bath Oolite at Cioughton, Yorkshire. 
2. T. melanoides.— The Blackish Terebra, pi. XXXII. 
fig. 45. 
Terebra melanoides. Phillips, Geo. of Yorkshire, I. p. 130, 
pi. 4, fig. 13. 
Shell consisting of thirteen or fourteen abruptly tapering 
volutions, terminating in an acute apex, with wide-set longi¬ 
tudinal ribs, which reach from the upper margin to the centre 
of each volution ; aperture straitened above and below. 
Found in the Coralline Oolite at Pickering, Yorkshire. 
3. T. granulata. —The Granulated Terebra, pi. XXXII. 
fig. 43. 
Terebra granulata. Phillips, Geo. of Yorkshire, I. p. 130, 
pi. 7, fig. 1G. 
Shell with thirteen or fourteen gradually tapering volu¬ 
tions, the whole shell with strong spiral granulated striae ; 
aperture somewhat rounded above and narrowed below ; 
pillar lip a little reflected on the columella, and widened at 
the base ; outer lip plain. 
Discovered in the Coralline Oolite at Pickering, York¬ 
shire. 
Genus XI.—BUCCINUM.— Linnaeus . 
Shell subovate, or ovato-conical, seldom elongated ; 
subturreted ; apex a little obtuse; spire of medium 
length, somewhat abruptly acuminate, but seldom of 
greater length than the aperture, which is suborbicular, 
ora little longer than wide; notched at the base, and 
hardly acute at its upper termination, where there is 
sometimes a small tooth-like process, formed by the 
thickening of the inside of the outer lip, with frequently 
a similar tooth opposed to it at the superior part of 
outer lip, these enclosing a small sinus ; outer lip rather 
acute at the edge, sometimes internally and transversely 
grooved, and,in some instances, with a dentated margin ; 
columella smooth, sometimes a little roughened at its 
inferior extremity; canal generally very short and 
straight; operculum horny and thickened. 
1. B. lavatuMv —The Washed Buccinum, pi. XXXII. 
fig. 1, 2. 
Buccinum lavatum. Brander, Foss. Hant, fig. 16. Sower¬ 
by, Min. Conch. V. p. 11, pi. 412, fig. 3, 4. Fleming, Brit. 
An. p. 345. 
Oblong-ovate, consisting of six considerably acuminated 
and convex volutions, terminating in a short apex, with many 
prominent, longitudinal, equal, curved ribs, crossed by nume¬ 
rous strong spiral striae, which feel rough to the touch ; aper¬ 
ture oblong, somewhat contracted above; outer lip striated 
internally; crenulated at the margin, and destitute of a 
sinus. 
Found plentifully in the Blue Clay at Barton Cliff. 
2. B. cranulatum. — The Granulated Buccinum, pi. 
XXXII. fig. 7. 
Buccinum granulatum. Sowerby, Min. Conch. If. p. 18, 
pi. 110, fig. 4. JVassa granulatum. Fleming, Brit. An. 
p. 341. 
Shell oblong-ovate, consisting of five or six broad slightly 
inflated volutions, tapering to an obtuse apex; transversely 
striated, and furnished with twenty rows of moderately ele¬ 
vated tubercles, arranged in the form of longitudinal ribs, and 
sometimes largest on the upper margin of the volutions; 
aperture elongated, and slightly oblique; inner lip smooth, 
and reflected on the columella, with a tooth on its upper 
part, situate opposite one on the outer lip, producing the 
N 
